Punch and die for straightening valve stems



APPLICATION FILED JUNE 15, 1920- Patented Feb. 7, 1922.

lIVl/Ell/TOR FWELQMO ATTORNEY HnNnx r. WOLNICK, or CHICAGO, rumors, ASS-IGNOR 'roiniunnrcnn. cAn Ann,

FOUNDRY COMPANY, or NEW YORK, 1v. A lconronarro v on NEW JEBSEY.

PUNCH AND me roit smimmenme vA vE' s'rnivrs.

Specification of Letters Z Patent.

Patented Feb. '7 1922.

Application filed June 15, 1920. Serial No. 389,130.

To all whom it may concern:

Be it known that I, HENRY F. WoLNIoK, residing at Chicago, county of Cook, State of Illinios, and being a citizen of the United States, have invented certain new and useful Improvements in a Punch and Die for Straightening Valve Stems, of which the following is a full, clear, and exact descrip- ,.tion, such as will enable others skilled in the art to which it appertains to make and to use the same, reference being had to the accompanying drawings, which illustrate the preferred form of the invention, though it is to be understood that the invention is not limited to the exact details of construction shown and described, as it is obvious that various modifications thereof within the scope of the claims will occur to persons skilled in the art.

In said drawings:

Figure 1 is a side elevation of my improved device; and

Figure 2 is an end elevation.

It is the object of my invention to provide an improved device for straightening the stems of the valves for internal combustion engines comprising a plurality of dies adapted to be fitted to a punching machine or press for operation.

The device comprises a die block 1 adapted to be secured to the bed of the punching machine or press and provided with a slot in which is fitted thebottom die 2, the die being cushioned upon a layer of rubber 3 placed in the bottom of the slot. Dowel pins & in openings 5, 6 in the die block and die, respectively, serve to position the die block and die, and screws 7 secure the die 2 to the block 1. Mounted in an opening 8 that extends parallel to the slot is a rod 9 having a fiat portion lO engaged by a set screw 11 and a flat U-shaped member 12 provided with a slot 13 fixed to its outer end. The set screw 11 serves to prevent longitudinal or rotative movement of the rod 9 and by engagement with the flat portion 10 on the rod will always bring the U-shaped member 12 to the same position with respect to plane of the bottom of the machine bed.

The top die 14 is carried by a die block 15, being positioned thereon by the dowel pins 16 and secured thereto by screws 17. A stem 18, screw threaded to th block 15 and secured by set screw 19 is proviided for attaching the upper die block to the moving head of the punching machine or press.

The faces of both dies are provided with a plurality of uniformly spaced parallel proj ections 20 of equal size extending across the dies, the projections being slightly narrower than the intervening spaces and the dies and die blocks are fitted to the machine so that the projections of one die fit into the intervening spaces of the other die. The projections of both sets are cut away at the center, as shown in Fig. 2, so as to form a V-shaped slot extending across each projection. The U-shaped member 12 is so positioned on the rod 9 that a portion of its slot 13 is in line with the slots formed in the projections 20.

In using this device, the valve is placed with the valve head outside the U-shaped member 12 and the stem extending through the slot 13 and into the slots formed in the projections 20, the projection of the stem into these slots being determined by the adjustment of the rod 9 in the opening 8. With the valve in position, the dies are forced together and the valve stem engaged by'the inclined faces on the projections 20 and such portions of the stem as are bent are brought into line with the remainder of the stem.

What I claim is:

1. In a device for straightening valve stems, a die having a plurality of spaced proj ections, each pro ection being slotted at its center to receive the valve stem, a slotted adjustable means for positioning the valve stem in the slot and means adapted to so position the stem positioning means that its slot alines with the slots of the die. 7

2. In a device for straightening valve stems, a die having aplurality of spaced parallel projections, each projection being slotted at its center to receive the valve stem,

and an adjustable means, slotted to receive the valve stem, for positioning the valve stem on said die.

3. In a device for straightening valve stems, a pair of dies having a plurality of spaced projections on each die adapted to engage between the projections on the other die, each projection being slotted at its center to receive the valve stem, a slotted adjustable means for positioning the Valve stem in said slots andemeans adapted to so one of said blocks for positioning the valve 10 POSltlOIl the stem posltlonmg means that its stem 1n said slots.

slot alines With the slots of both dies. In Witness whereof I have hereunto set 4. In a device for straightening valve my hand in the presence of two Witnesses. stems a pan or die holchng blocks, dles hav- 1 HENRY F. O N

ing a plurality of spaced parallel projections carried by said blocks, each projection being Witnesses: V slotted at its center to receive the valve stem A. A. PUBILSKI, and an adjustable slotted member carried by J. B. KROMOR. 

